Are you having trouble shifting out of park? Would it be a bad solenoid/tranny?
Shifting gears without syncros in your standard transmission would be anything but easy.
Yes, it is possible on an electronically controlled transmission.
the shaft inside the tranny is broke.
Try changing your PCV valve it messes with the idle control. and shifting prob is likely in tranny and may not be related at all. try PCV valve and have your tranny serviced.
change your tranny filter and have it serviced. whatch out though if you never serviced it and your oil is not red, could result in tranny slipping.
under the tranny pan to the rear of the pan
because its a peice of _ _ _ T
Chech ALL vacuum hoses. The tranny shifts by monitoring vacuum pressure.
maybe low on fluid or strainer stoped up
change your tranny pan trans filter its easy just ake sure totorc your bolts could be drive line or rear end too
4l80e or 4l80-e is the tranny they use and they do have to of them, one is for the speedometer gauge and one tells it when to shift